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 399 Posts Member #: 793 Senior Member Milton Keynes |
18th Nov, 2008 at 09:30:48pm
Are 1.5 rockers worth fitting to a good spec turbo motor running 266 cam or a Phase 2 with 18psi. I've always used these on my aspirated engines and always got gains but turbo is a new learning curve for me http://i28.photobucket.com/albums/c248/spe...er1/mini007.jpg
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 3692 Posts Member #: 1833 Formally mini_majic Auckland, New Zealand |
18th Nov, 2008 at 09:54:05pm
i think this has been talked about a few times a little while back.
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 1252 Posts Member #: 1656 Post Whore stoke-on-trent |
18th Nov, 2008 at 10:30:36pm
on the advice of ian from avonbar i elected to go for 1.3 ratio roller rockers. he reckoned there was nothing to gain from the higher lift on a forced induction engine and after reading up on the subject on here and a couple of other places i have to agree, although a side by side dyno test would be interesting On 23rd Oct, 2009 sim_ou_nao said:
eu gosto de mamas = i like boobs |
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 7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
18th Nov, 2008 at 11:25:07pm
Yeah, both Carl and Jimbo have got very powerful turbo-Minis, and they don't use 1.5 rockers.. On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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 11046 Posts Member #: 965 Post Whore Preston On The Brook |
19th Nov, 2008 at 12:11:07am
On 18th Nov, 2008 Vegard said:
Yeah, both Carl and Jimbo have got very powerful turbo-Minis, and they don't use 1.5 rockers.. Matty's too, when its not pretending to be a Newcomen Steam engine 
On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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1641 Posts Member #: 178 Post Whore stowmaket suffolk |
19th Nov, 2008 at 06:57:01am
yep not much to gain but much to lose i have found.
always looking for them bigger bunches of bannanas |
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399 Posts Member #: 793 Senior Member Milton Keynes |
19th Nov, 2008 at 07:12:36am
Cheer's chaps I think that answers things http://i28.photobucket.com/albums/c248/spe...er1/mini007.jpg
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 9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
19th Nov, 2008 at 10:17:16pm
On 19th Nov, 2008 turbo hogster said:
yep not much to gain but much to lose i have found. the extra pressure on the cam followers has a tendancy to screw up your follwers and cam lobes. in turb extra swarf in sump , in turn knackered oil pump. both me and mini willy had this problem for years but soon as we went to 1.3 roler tip rockers problem totally gone. and t3tone done the comparison test from 1.5 to 1.3 rockers and lost no power what so ever. yes! question answerd  you will gain nothing down below lose in the middle rpm range and gain 3 mouse power at the very top rpm band.
plus the above what hoggy mentioned unless you pay particular attention to spring pressures Edited by BENROSS on 19th Nov, 2008.
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Site Admin  9407 Posts Member #: 58 455bhp per ton 12 sec 1/4 mile road legal mini Sunny Bridgend, South Wales |
19th Nov, 2008 at 10:22:18pm
I use to use 1.5 rockers on my engine, found they worked well. On 15th May, 2009 TurboDave said:
I think the welsh one has it right! 1st to provide running proof of turbo twinkie in a car and first to run a 1/4 in one!! Is your data backed up?? one extra month free for all Turbo minis members, PM me for detials |
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9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
19th Nov, 2008 at 11:56:26pm
spring pressures jim
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1641 Posts Member #: 178 Post Whore stowmaket suffolk |
20th Nov, 2008 at 07:10:36am
we used the porgressive 180 lb springs from minispares, but i recon a lighter spring would have been ok. depending on your rev limit. always looking for them bigger bunches of bannanas |
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p.s I did try a search and what I found didn't realy answer the question.| Page: |